---
name: "trace_block_sleeprq"
section: "9"
platform: "linux"
package: "linux-manual-4.9"
version: "4.9.228-1"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/trace_block_sleeprq"
---

# trace\_block\_sleeprq(9)

waiting to get a free request entry in queue for block IO operation

## NAME

trace\_block\_sleeprq - waiting to get a free request entry in queue for block IO operation

## SYNOPSIS

**void trace\_block\_sleeprq(struct request\_queue \*** *q***, struct bio \*** *bio***, int** *rw***);**

## ARGUMENTS

*q*

queue for operation

*bio*

pending block IO operation

*rw*

low bit indicates a read (**0**) or a write (**1**)

## DESCRIPTION

In the case where a request struct cannot be provided for queue *q* the process needs to wait for an request struct to become available. This tracepoint event is generated each time the process goes to sleep waiting for request struct become available.

## AUTHORS

**Jason Baron** \<jbaron@redhat.com\>

Author.

**William Cohen** \<wcohen@redhat.com\>

Author.

## COPYRIGHT